THE BROWN COUNTY LAND BRIEF
Land in the
Drift Plains setting.
Brown County has 1,713 square miles of land in South Dakota. 3 mapped landscape regions meet across Brown County: Drift Plains, Glacial Lake Basins, Glacial Lake Deltas.
Flat to gently rolling glacial terrain supports a prairie transition between taller and shorter grasses. Many temporary and seasonal wetlands occupy depressions left in the glacial landscape.
Regional context: Northern Glaciated Plains ↗ · Regional mapping across the county footprint
Where the landscape changes
Brown County intersects 3 mapped regional units. The largest mapped shares are:
- Drift Plains45.6%
- Glacial Lake Basins43.7%
- Glacial Lake Deltas10.7%
Finding your parcel within Brown County
The atlas lists 60 cities, towns, townships, and Census communities associated with Brown County, including Warner, Gem, Claremont. The list includes overlapping geography types and does not divide the county into exclusive service areas.
Brown County by land and water
The Census records 17.9 square miles of water within Brown County, or 1% of its total area. That share is close to Brown County’s 1%. This is geographic context; waterfront status and usable land must be checked at the parcel.
For scale, Brown County has 1,129.2 times the land area of nearby Columbia city (1.52 square miles). These areas describe boundaries, not comparable property prices.
The Census boundary meets Day County, Edmunds County, Faulk County, Marshall County, McPherson County, Spink County within South Dakota. A tract near one of these lines should be matched to the county identifier on its own records.

